Initial support of annotation loading at runtime

In order to locate an annotated entity, we need to implement almost the whole
Java element model (which will be used anyway for Java descriptor loading)

compiler/testData/loadJava/compiledJava/annotations/StringConstantInParam.java

@@ -1,3 +1,5 @@
+// SKIP_IN_RUNTIME_TEST because there's no stable way to determine if a field is initialized with a non-null value in runtime
+
 package test;
 
 public interface StringConstantInParam {

compiler/testData/loadJava/compiledJava/static/StaticFinal.java

@@ -1,5 +1,12 @@
+// SKIP_IN_RUNTIME_TEST because there's no stable way to determine if a field is initialized with a non-null value in runtime
+
 package test;
 
 public class StaticFinal {
-    public static final String foo = "aaa";
+    public static final String publicNonNull = "aaa";
+    public static final String publicNull = null;
+    static final String packageNonNull = "bbb";
+    static final String packageNull = null;
+    private static final String privateNonNull = "bbb";
+    private static final String privateNull = null;
 }

compiler/testData/loadJava/compiledJava/static/StaticFinal.txt

@@ -4,5 +4,10 @@ public open class StaticFinal {
     public constructor StaticFinal()
 
     // Static members
-    public final val foo: kotlin.String = "aaa"
+    public/*package*/ final val packageNonNull: kotlin.String = "bbb"
+    public/*package*/ final val packageNull: kotlin.String!
+    private final val privateNonNull: kotlin.String = "bbb"
+    private final val privateNull: kotlin.String!
+    public final val publicNonNull: kotlin.String = "aaa"
+    public final val publicNull: kotlin.String!
 }